Where magnetite has been recorded in Minnesota

Found alongside

• Magnetite

  Mohs 5.5–6.5. Black and strongly magnetic. Mindat

  594 sites

• Quartz

  Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat

  24 sites

• Pyrite

  Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat

  24 sites

• Copper

  Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat

  15 sites

• Mica

  Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat

  6 sites

• Gold

  Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat

  4 sites

Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.

How we built this page: we counted named sites in the USGS Mineral Resources Data System (MRDS) for this area, left out sand, gravel, crushed stone, clay pits and unnamed sites, grouped them by Census county, and linked every site to its USGS record. We did not visit these sites, and MRDS does not tell you who owns the land or whether collecting is allowed.

Source: USGS Mineral Resources Data System (MRDS). USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date. Each site links to its USGS record.

Updated October 2026